Sulfur Dioxide (1971) Nonattainment Areas

As of September 22, 2016
Grouped by Designation

PRIMARY
Armstrong Co, PA
Hayden (Pinal County), AZ
Laurel Area (Yellowstone County), MT
Piti, GU
Tanguisson, GU

PRIMARY, SECONDARY
East Helena Area (Lewis and Clark Co.), MT
Salt Lake Co, UT
Tooele Co, UT
Warren Co, NJ

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